1/* 2 3Copyright (c) 2002, Calum Robinson 4All rights reserved. 5 6Redistribution and use in source and binary forms, with or without 7modification, are permitted provided that the following conditions are met: 8 9* Redistributions of source code must retain the above copyright notice, this 10 list of conditions and the following disclaimer. 11 12* Redistributions in binary form must reproduce the above copyright notice, 13 this list of conditions and the following disclaimer in the documentation 14 and/or other materials provided with the distribution. 15 16* Neither the name of the author nor the names of its contributors may be used 17 to endorse or promote products derived from this software without specific 18 prior written permission. 19 20THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 21ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 22WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 23DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 24ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 25(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 27ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31*/ 32 33 34#include "Spark.h" 35#include "Shared.h" 36 37 38#define BIGMYSTERY 1800.0 39#define MAXANGLES 16384 40 41#define fieldCoherence 0 42#define fieldSpeed 12.0f 43#define fieldRange 1000.0f 44 45 46void 47InitSpark(Spark* s) 48{ 49 for (int i = 0; i < 3; i++) 50 s->position[i] = RandFlt(-100.0, 100.0); 51} 52 53 54void DrawSpark(flurry_info_t* info, Spark* s) 55{ 56 const float black[4] = {0.0f, 0.0f, 0.0f, 1.0f}; 57 float width; 58 float sx; 59 float sy; 60 float a; 61 float c = 0.0625f; 62 float screenx; 63 float screeny; 64 float w; 65 float z; 66 float scale; 67 width = 60000.0f * info->sys_glWidth / 1024.0f; 68 69 z = s->position[2]; 70 sx = s->position[0] * info->sys_glWidth / z + info->sys_glWidth * 0.5f; 71 sy = s->position[1] * info->sys_glWidth / z + info->sys_glHeight * 0.5f; 72 w = width*4.0f / z; 73 74 screenx = sx; 75 screeny = sy; 76 77 glPushMatrix(); 78 glTranslatef(screenx,screeny,0.0f); 79 scale = w/50.0f; 80 glScalef(scale,scale,0.0f); 81 for (int k = 0; k < 12; k++) { 82 a = ((float)(random() % 3600)) / 10.0f; 83 glRotatef(a,0.0f,0.0f,1.0f); 84 glBegin(GL_QUAD_STRIP); 85 glColor4fv(black); 86 glVertex2f(-3.0f,0.0f); 87 a = 2.0f + (float) (random() & 255) * c; 88 glVertex2f(-3.0f,a); 89 glColor4fv(s->color); 90 glVertex2f(0.0f,0.0f); 91 glColor4fv(black); 92 glVertex2f(0.0f,a); 93 glVertex2f(3.0f,0.0f); 94 glVertex2f(3.0f,a); 95 glEnd(); 96 } 97 98 glPopMatrix(); 99} 100 101 102void 103UpdateSparkColour(flurry_info_t* info, Spark* s) 104{ 105 const float rotationsPerSecond = (float)(2.0 * M_PI * fieldSpeed 106 / MAXANGLES); 107 double thisPointInRadians; 108 double thisAngle = info->fTime*rotationsPerSecond; 109 float cf; 110 float cycleTime = 20.0f; 111 float colorRot; 112 float redPhaseShift; 113 float greenPhaseShift; 114 float bluePhaseShift; 115 float baseRed; 116 float baseGreen; 117 float baseBlue; 118 float colorTime; 119 120 if (info->currentColorMode == rainbowColorMode) 121 cycleTime = 1.5f; 122 else if (info->currentColorMode == tiedyeColorMode) 123 cycleTime = 4.5f; 124 else if (info->currentColorMode == cyclicColorMode) 125 cycleTime = 20.0f; 126 else if (info->currentColorMode == slowCyclicColorMode) 127 cycleTime = 120.0f; 128 129 colorRot = (float)(2.0 * M_PI / cycleTime); 130 redPhaseShift = 0.0f; /* cycleTime * 0.0f / 3.0f */ 131 greenPhaseShift = cycleTime / 3.0f; 132 bluePhaseShift = cycleTime * 2.0f / 3.0f; 133 colorTime = info->fTime; 134 if (info->currentColorMode == whiteColorMode) { 135 baseRed = 0.1875f; 136 baseGreen = 0.1875f; 137 baseBlue = 0.1875f; 138 } else if (info->currentColorMode == multiColorMode) { 139 baseRed = 0.0625f; 140 baseGreen = 0.0625f; 141 baseBlue = 0.0625f; 142 } else if (info->currentColorMode == darkColorMode) { 143 baseRed = 0.0f; 144 baseGreen = 0.0f; 145 baseBlue = 0.0f; 146 } else { 147 if (info->currentColorMode < slowCyclicColorMode) 148 colorTime = (info->currentColorMode / 6.0f) * cycleTime; 149 else 150 colorTime = info->fTime + info->randomSeed; 151 152 baseRed = 0.109375f 153 * ((float)cos((colorTime + redPhaseShift) * colorRot) + 1.0f); 154 baseGreen = 0.109375f 155 * ((float)cos((colorTime + greenPhaseShift) * colorRot) + 1.0f); 156 baseBlue = 0.109375f 157 * ((float)cos((colorTime + bluePhaseShift) * colorRot) + 1.0f); 158 } 159 160 cf = ((float)(cos(7.0 * ((info->fTime) * rotationsPerSecond)) 161 + cos(3.0 * ((info->fTime) * rotationsPerSecond)) 162 + cos(13.0 * ((info->fTime) * rotationsPerSecond)))); 163 cf /= 6.0f; 164 cf += 2.0f; 165 thisPointInRadians = 2.0 * M_PI * (double) s->mystery / (double) BIGMYSTERY; 166 167 s->color[0] = baseRed + 0.0625f 168 * (0.5f + (float)cos((15.0 * (thisPointInRadians + 3.0*thisAngle))) 169 + (float)sin((7.0 * (thisPointInRadians + thisAngle)))); 170 s->color[1] = baseGreen + 0.0625f 171 * (0.5f + (float)sin(((thisPointInRadians) + thisAngle))); 172 s->color[2] = baseBlue + 0.0625f 173 * (0.5f + (float)cos((37.0 * (thisPointInRadians + thisAngle)))); 174} 175 176 177void 178UpdateSpark(flurry_info_t* info, Spark* s) 179{ 180 const float rotationsPerSecond = (float) (2.0*M_PI*fieldSpeed/MAXANGLES); 181 double thisPointInRadians; 182 double thisAngle = info->fTime*rotationsPerSecond; 183 float cf; 184 double tmpX1,tmpY1,tmpZ1; 185 double tmpX2,tmpY2,tmpZ2; 186 double tmpX3,tmpY3,tmpZ3; 187 double tmpX4,tmpY4,tmpZ4; 188 double rotation; 189 double cr; 190 double sr; 191 float cycleTime = 20.0f; 192 float colorRot; 193 float redPhaseShift; 194 float greenPhaseShift; 195 float bluePhaseShift; 196 float baseRed; 197 float baseGreen; 198 float baseBlue; 199 float colorTime; 200 201 float old[3]; 202 203 if (info->currentColorMode == rainbowColorMode) 204 cycleTime = 1.5f; 205 else if (info->currentColorMode == tiedyeColorMode) 206 cycleTime = 4.5f; 207 else if (info->currentColorMode == cyclicColorMode) 208 cycleTime = 20.0f; 209 else if (info->currentColorMode == slowCyclicColorMode) 210 cycleTime = 120.0f; 211 212 colorRot = (float)(2.0 * M_PI / cycleTime); 213 redPhaseShift = 0.0f; /* cycleTime * 0.0f / 3.0f */ 214 greenPhaseShift = cycleTime / 3.0f; 215 bluePhaseShift = cycleTime * 2.0f / 3.0f ; 216 colorTime = info->fTime; 217 if (info->currentColorMode == whiteColorMode) { 218 baseRed = 0.1875f; 219 baseGreen = 0.1875f; 220 baseBlue = 0.1875f; 221 } else if (info->currentColorMode == multiColorMode) { 222 baseRed = 0.0625f; 223 baseGreen = 0.0625f; 224 baseBlue = 0.0625f; 225 } else if (info->currentColorMode == darkColorMode) { 226 baseRed = 0.0f; 227 baseGreen = 0.0f; 228 baseBlue = 0.0f; 229 } else { 230 if (info->currentColorMode < slowCyclicColorMode) 231 colorTime = (info->currentColorMode / 6.0f) * cycleTime; 232 else 233 colorTime = info->fTime + info->randomSeed; 234 235 baseRed = 0.109375f 236 * ((float)cos((colorTime + redPhaseShift) * colorRot) + 1.0f); 237 baseGreen = 0.109375f 238 * ((float)cos((colorTime + greenPhaseShift) * colorRot) + 1.0f); 239 baseBlue = 0.109375f 240 * ((float)cos((colorTime + bluePhaseShift) * colorRot) + 1.0f); 241 } 242 243 for (int i = 0; i < 3; i++) 244 old[i] = s->position[i]; 245 246 cf = ((float)cos(7.0 * ((info->fTime) * rotationsPerSecond) 247 + (float)cos(3.0 * ((info->fTime) * rotationsPerSecond)) 248 + (float)cos(13.0 * ((info->fTime) * rotationsPerSecond)))); 249 cf /= 6.0f; 250 cf += 2.0f; 251 thisPointInRadians = 2.0 * M_PI * (double)s->mystery / (double)BIGMYSTERY; 252 253 s->color[0] = baseRed + 0.0625f 254 * (0.5f + (float) cos((15.0 * (thisPointInRadians + 3.0*thisAngle))) 255 + (float) sin((7.0 * (thisPointInRadians + thisAngle)))); 256 s->color[1] = baseGreen + 0.0625f 257 * (0.5f + (float) sin(((thisPointInRadians) + thisAngle))); 258 s->color[2] = baseBlue + 0.0625f 259 * (0.5f + (float) cos((37.0 * (thisPointInRadians + thisAngle)))); 260 s->position[0] = fieldRange * cf 261 * (float)cos(11.0 * (thisPointInRadians + (3.0*thisAngle))); 262 s->position[1] = fieldRange * cf * 263 (float) sin(12.0 * (thisPointInRadians + (4.0*thisAngle))); 264 s->position[2] = fieldRange * 265 (float) cos((23.0 * (thisPointInRadians + (12.0*thisAngle)))); 266 267 rotation = thisAngle * 0.501 + 5.01 * (double)s->mystery 268 / (double)BIGMYSTERY; 269 cr = cos(rotation); 270 sr = sin(rotation); 271 tmpX1 = s->position[0] * cr - s->position[1] * sr; 272 tmpY1 = s->position[1] * cr + s->position[0] * sr; 273 tmpZ1 = s->position[2]; 274 275 tmpX2 = tmpX1 * cr - tmpZ1 * sr; 276 tmpY2 = tmpY1; 277 tmpZ2 = tmpZ1 * cr + tmpX1 * sr; 278 279 tmpX3 = tmpX2; 280 tmpY3 = tmpY2 * cr - tmpZ2 * sr; 281 tmpZ3 = tmpZ2 * cr + tmpY2 * sr + seraphDistance; 282 283 rotation = thisAngle * 2.501 + 85.01 * (double)s->mystery 284 / (double)BIGMYSTERY; 285 cr = cos(rotation); 286 sr = sin(rotation); 287 tmpX4 = tmpX3 * cr - tmpY3 * sr; 288 tmpY4 = tmpY3 * cr + tmpX3 * sr; 289 tmpZ4 = tmpZ3; 290 291 s->position[0] = (float) tmpX4 + RandBell(5.0f*fieldCoherence); 292 s->position[1] = (float) tmpY4 + RandBell(5.0f*fieldCoherence); 293 s->position[2] = (float) tmpZ4 + RandBell(5.0f*fieldCoherence); 294 295 for (int i = 0;i < 3; i++) 296 s->delta[i] = (s->position[i] - old[i]) / info->fDeltaTime; 297} 298